Defensive publication

ABSTRACT

NOVEL, HIGH MOLECULAR WEIGHT POLYMERS CONTAINING 3,6DIHYDROXY-9,9-DIMETHYLXANTHENE UNITS ARE USEFUL IN THE PREPARATION OF PHOTOGRAPHIC FILM BASES.

DEFENSIVE PULICATION UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Dec. 16, 1969, 869 0.6%. 687. The abstracts of Defensive Publication applications are identified by distinctly numbered series and are arranged chronologically. The heading of each abstract indicates the number of pages of specification, including claims and sheets of drawings contained in the application as originally filed. The files of these applications are available to the public for inspection and reproduction may be purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to the merits of alleged invention. The Patent Office makes no assertion as to the novelty of the disclosed subject matter.

PUBLISHED MARCH 14, 1972 896 O.Gr. 422

T896,034 FILM FORMING POLYMERIC COMPOSITIONS Frederick L. Hamb and John C. Wilson, both of 1669 Lake Ave., Rochester, N.Y. 14650 Filed May 7, 1971, Ser. No. 141,398 Int. Cl. G03c 1/78 U.S. CI. 96-87 R No Drawing. 28 Pages Specification Novel, high molecular Weight polymers containing 3,6- dihydroxy-9,9-dimethy1xanthene units are useful in the preparation of photographic film bases. 

